diff --git a/test/asynchronous/test_custom_types.py b/test/asynchronous/test_custom_types.py
index c89118c20..613705b28 100644
--- a/test/asynchronous/test_custom_types.py
+++ b/test/asynchronous/test_custom_types.py
@@ -201,12 +201,14 @@ class CustomBSONTypeTests:
         fileobj.close()
 
 
+@skip_if_rust_bson
 class TestCustomPythonBSONTypeToBSONMonolithicCodec(CustomBSONTypeTests, unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         cls.codecopts = DECIMAL_CODECOPTS
 
 
+@skip_if_rust_bson
 class TestCustomPythonBSONTypeToBSONMultiplexedCodec(CustomBSONTypeTests, unittest.TestCase):
     @classmethod
     def setUpClass(cls):
@@ -279,6 +281,7 @@ class TestBSONFallbackEncoder(unittest.TestCase):
         self.assertEqual(called_with, [2 << 65])
 
 
+@skip_if_rust_bson
 class TestBSONTypeEnDeCodecs(unittest.TestCase):
     def test_instantiation(self):
         msg = "Can't instantiate abstract class"
@@ -439,6 +442,7 @@ class TestBSONCustomTypeEncoderAndFallbackEncoderTandem(unittest.TestCase):
             encode({"x": self.TypeA(100)}, codec_options=codecopts)
 
 
+@skip_if_rust_bson
 class TestTypeRegistry(unittest.TestCase):
     types: Tuple[object, object]
     codecs: Tuple[Type[TypeCodec], Type[TypeCodec]]
@@ -752,6 +756,7 @@ class TestCollectionWCustomType(AsyncIntegrationTest):
         self.assertIsNone(await c.find_one())
 
 
+@skip_if_rust_bson
 class TestGridFileCustomType(AsyncIntegrationTest):
     async def asyncSetUp(self):
         await super().asyncSetUp()
@@ -918,6 +923,7 @@ class ChangeStreamsWCustomTypesTestMixin:
             await run_test(doc_cls)
 
 
+@skip_if_rust_bson
 class TestCollectionChangeStreamsWCustomTypes(
     AsyncIntegrationTest, ChangeStreamsWCustomTypesTestMixin
 ):
@@ -937,6 +943,7 @@ class TestCollectionChangeStreamsWCustomTypes(
         await self.input_target.delete_many({})
 
 
+@skip_if_rust_bson
 class TestDatabaseChangeStreamsWCustomTypes(
     AsyncIntegrationTest, ChangeStreamsWCustomTypesTestMixin
 ):
@@ -957,6 +964,7 @@ class TestDatabaseChangeStreamsWCustomTypes(
         await self.input_target.insert_one({"data": "dummy"})
 
 
+@skip_if_rust_bson
 class TestClusterChangeStreamsWCustomTypes(
     AsyncIntegrationTest, ChangeStreamsWCustomTypesTestMixin
 ):
diff --git a/test/test_custom_types.py b/test/test_custom_types.py
index 598c56dc0..782287efb 100644
--- a/test/test_custom_types.py
+++ b/test/test_custom_types.py
@@ -201,12 +201,14 @@ class CustomBSONTypeTests:
         fileobj.close()
 
 
+@skip_if_rust_bson
 class TestCustomPythonBSONTypeToBSONMonolithicCodec(CustomBSONTypeTests, unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         cls.codecopts = DECIMAL_CODECOPTS
 
 
+@skip_if_rust_bson
 class TestCustomPythonBSONTypeToBSONMultiplexedCodec(CustomBSONTypeTests, unittest.TestCase):
     @classmethod
     def setUpClass(cls):
@@ -279,6 +281,7 @@ class TestBSONFallbackEncoder(unittest.TestCase):
         self.assertEqual(called_with, [2 << 65])
 
 
+@skip_if_rust_bson
 class TestBSONTypeEnDeCodecs(unittest.TestCase):
     def test_instantiation(self):
         msg = "Can't instantiate abstract class"
@@ -439,6 +442,7 @@ class TestBSONCustomTypeEncoderAndFallbackEncoderTandem(unittest.TestCase):
             encode({"x": self.TypeA(100)}, codec_options=codecopts)
 
 
+@skip_if_rust_bson
 class TestTypeRegistry(unittest.TestCase):
     types: Tuple[object, object]
     codecs: Tuple[Type[TypeCodec], Type[TypeCodec]]
@@ -752,6 +756,7 @@ class TestCollectionWCustomType(IntegrationTest):
         self.assertIsNone(c.find_one())
 
 
+@skip_if_rust_bson
 class TestGridFileCustomType(IntegrationTest):
     def setUp(self):
         super().setUp()
@@ -918,6 +923,7 @@ class ChangeStreamsWCustomTypesTestMixin:
             run_test(doc_cls)
 
 
+@skip_if_rust_bson
 class TestCollectionChangeStreamsWCustomTypes(IntegrationTest, ChangeStreamsWCustomTypesTestMixin):
     @client_context.require_change_streams
     def setUp(self):
@@ -935,6 +941,7 @@ class TestCollectionChangeStreamsWCustomTypes(IntegrationTest, ChangeStreamsWCus
         self.input_target.delete_many({})
 
 
+@skip_if_rust_bson
 class TestDatabaseChangeStreamsWCustomTypes(IntegrationTest, ChangeStreamsWCustomTypesTestMixin):
     @client_context.require_version_min(4, 2, 0)
     @client_context.require_change_streams
@@ -953,6 +960,7 @@ class TestDatabaseChangeStreamsWCustomTypes(IntegrationTest, ChangeStreamsWCusto
         self.input_target.insert_one({"data": "dummy"})
 
 
+@skip_if_rust_bson
 class TestClusterChangeStreamsWCustomTypes(IntegrationTest, ChangeStreamsWCustomTypesTestMixin):
     @client_context.require_version_min(4, 2, 0)
     @client_context.require_change_streams